Detachable smoke hood



Sept. 23 1924.

R. ca. MARR ET AL DETAGHAQBLE SMOKE. HOOD Filed Jan. 19; 1924 25beets-$heat 2 rflllflflilllll! (hi) uiii; 9

8 NVENTSAIX (awe; ATTORNEY Patented Sept. 23, 19240 unirsn starts rarsnrorrics.

ROBERT Gr. MARE AND GEORGE A. VEDDER, OF RICHMOND, NEW YORK.

DETACHABLE SMOKE HOOD.

To all whom c't may concern:

Be it known that we, ROBERT G. Mann and GEORGE A. Vnnnnn, citizens ofthe United States, residing at Port Richmond, in the county of Richmondand State of New York, have invented certain new and usefullimprovements in Detachable Smoke Hoods; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same. 1

Our invention consists in the novel features hereinafter described,reference being had to the accompanying drawings which show oneembodiment of the invention selected by us for purposes of illustration,and the said invention is fully disclosed in the following descriptionand claims.

The object of our invention is to provide a detachable smoke hood forfire tube steam boilers, and is particularly designed. for use inconnection with such steam boilers for supplying steam for operatingautomotive vehicles, although it is applicable to other typesof boilers.In the operation of boilers of this kind in automobiles, it happens inthe course of time that a tube becomes defective, permitting pressure toescape. It is easily possible to repair or plug defective boiler tubeswhere access can be had to them for that purpose, but in the ordinaryconstruc tion of fire tube boilers for automobile purposes, they areusually encased in heat insulating material and the construction of theboilers is such that a very considerable amount of time and labor isrequired to expose the boiler sufficiently to obtain access to the firetubes and to recover it after the repairs, whether temporary orpermanent, have been made. Thus, for example, in the case of a defectivetube, the tube can be plugged and put out of commission so as to enablethe boiler to be used with the remaining tubes in a few minutes, and inthe case of a loosened lire tube, where the tube is not injured, thejoint between the fire tube and the head of the boiler can be closed bya suitable expanding tool in a few minutes, and both of these operationscould be performed onv the road if the operator of the automobile wasprovided with the necessary and comparatively simple appliances, but inpractice it requires about half a day to remove the insulating coveringand smoke hood to give access to the fire tubes and re- ,5, as indicatedin 2.

Application filed January 19, 1924. Serial No. 687,237.

assemble the smoke hood and replace the heat insulating coveringthereof, which is in many cases applied in the form of a plastic mass. I

The object of our invention is to provide a boiler of this type with adetachable smoke hood hel rigidly in position with respect to theboiler, when in use, and to provide it with the necessary heatinsulating ma.- terial, but which is provided with a removable coversubstantially coextensive with the head of the boiler so that the boilerhead can be readily accessible, and if desired the entire smoke hood canbe removed to give access to the boiler tubes for the purpose ofrepairing the same either temporarily or permanently. By the use of ourdetachable smoke hood, a boiler tube may frequently be repaired orplugged on the road within a few minutes, or in the service station,with out the loss of time and expense incidental to the laborious methodof removing smoke hood, which is now necessary.

In the accompanying drawings we have shown more or less diagrammaticallyour invention applied to the vertical boiler of well known type, forpurposes of illustration, the details regarding the boiler itself, itsconnections, and the heating burner therefor, being omitted as the sameform no part of our present invention.

in the said drawings,

1 is a perspective view of a portion of the chassis of an automobileprovided with a steam boiler and having our improved detachable smokehood applied thereto.

Fig. 2 is a rear elevation of the boiler and smoke hood, a portion beingbroken away.

Fig. 3 is a top plan view of the smoke hood.

Fig. at is a horizontal sectional view of the same.

Fig. 5 is a detail sectional view of part of the mechanism.

Fig. 6 is a detail sectional view of the hinged door in the hood cover,and its stop.

In the accompanying drawings, 1, represents the chassis or frame of anautomobile, 2, the front wheels, 3, the radiator, and 4, the verticalfire tube boiler, all of usual or any preferred construction, he boilerbeing provided with the usual vertical fire tubes, Our improved smokehood comprises a cylindrical double walled casing, composed of sheetmetal preferably iron or steel, and composed of an exterior cylindricalwall, 6, and an internal cylindrical wall, 7, of less vertical extentthan the exterior wall, the said walls bein spaced apart by suitablespacing devices, indicated at 8 in Fig. t, being preferably formed ofvertical angle iron, Z-shaped in cross section as shown, and havingtheir flanges riveted, brazed or welded to the inner and outer shells soas to form a substantially continuous annular space between the innerand outer shells which is filled with heat insulating material,indicated at 9, which may be permanently inserted between the shells, 6and 7. The upper and lower portions of the exterior shell, 6, e):- tendsbeyond the shell, 7, and the heat in sulating material, 9, as clearlyshown in Fig. 2, and form annular attaching flanges, 10 and 11. Theexterior shell, 6, is of such diameter that the lower flange, 10,thereof willfit snuglyaround the upper end of the boiler, 4, as shown inFig. 2, and is conveniently secured thereto by an annular clamp, so asto be readily detachable therefrom. In forming this clamp we prefer toemploy two nearly semi-circular bands, indica'ted at 1212, of iron,steel, or other suitable metal, each of which is provided adjacent toeach end with an angular bracket,

13, which is preferably formed separately from the clamp member, 12, andis provided with a base portion, let, secured to the clamp memberdetachably by means of machine screws. The outwardly extending portionsof the brackets, 13, are provided with apertures so that when the clampmembers are placed around the depending flange, 10, of the outer casingof the smoke hood. the clamp members may be connected by means of bolts,15, and nuts, 16. and when these nuts are screwed up the clampingmembers will form an annular clamp which will slightly compress thedepending flange, 10, of the smoke hood, and hold it rigidly butdetachably with respect to the boiler, 4.

The upper portion of the smoke hood is provided with a removable cover,of sheet metal, preferably iron or steel, which is constructed as to littightly within the upwardly projecting flange, 11, of the outer shell,and rest upon the upper edge of the inner shell, as indicated in Fig. 2.This cover comprises an upper plate, 17, and lower plate, 18, which ispreferably pro.- vided with an annular flange, 19, secured to the upperplate, 17, in any usual or de sired manner, for example as indicated inthe enlarged cross section, Fig. 5, in which the upper edge of theannular vertical flange, 19, is bent outwardly, as indicated at, 20, andthe outer edge of the top plate, 17, is bent over the outwardlyextending annular portion, 20, as indicated at 21, to form a head whichrests upon the upper edge of the exterior shell, 6. The cover isprovided between. the plates, 17 and 18, with heat insulating material,indicated at 22. throughout its entire extent and the cover is alsoprovided with an aperture, indicated at 23, normally closed by a hingedcover, 24;, also formed of sheet metal, preferably iron or steel, andalso preferably made hollow as shown in Fig. 2, and provided interiorlywith heat insulating material. 25. Fe prefer to make the aperture, 23,rectangular in cross section and to have the inner walls, 26, of saidaperture, l'lai'iged slightly from top to the bottom of the cover and toconstrrut the door, 24;, with its lateral edges inclined inwardly so asto lit this tapered aperture when the door is in closed position, asshown in Fig. 2, thus maintaining the door in closed position and alsomaintaining a tight joint. The cover is held in position with respect tothe smoke hood by clamping members, 27-27 provided with brackets. havingbase portions, .29, detachably secured to the clamping members by screwsor bolts, 30, and nuts, 3], uniting the adjacent ends of the clampingmembers, 27, when the parts are in operative position, so to clamp theupwardly projecting flange portion, 11, of the exterior shell, 6, iirmlvupon the lateral edges of the cover and hold it firmly in position.

in. order to provide a normal outlet for the products of cmnlnistioufrom the smoke hood. the hood proper is provided with an aperture.preferably rectangular in cross section, indicated by dotted lines inFig. at 12. which cimiuulnicatcs with an outlet pipe. preferably in theform ot a rectangular elbow. formed of sheet metal. preterublv iron orsteel. and indicated at 33. dis ichar iing dmvnwardlv as shown. Thiselbow can be coi'ireniently held in operative pos tion by providingitwith laterally extending vertical flangr i t. at its inner portion.which engage reitically disposed cleats, .hl. secured to the outershell. (5. in such manner that the elbow. Ill"), can be placed inposition by bringing the lower ends of the flanges. 34:, into engagementwith the upper ends ot the :leats, 3:3. and sliding the elbowdownwardly, the elbow beirg constructed to conform to the curvature ofthe exte ior shell. 6. The elbow will be maintained in opera tiveposition by the clamping niei'i'ibei's 1.2 and 27, respectively. theclamping member. supporting the elbow at the lower ends of the cleats,and the clamping member. 27. holding it firmly against upward movement.

In the use of our improved smoke hood t will be readily understood that.should it be come necessary to obtain access to the boiler tubes forpurposes of repair. the. bolts and nuts Ell, may be loosened to permitthe removal of the clamping members. 27-2", thereby freeing thedetachable cover which may be removed so as to give access to the upperends of all the boiler tubes. If it is desired or considered necessaryto remove the hood itself, this can be readily accomplished by looseningthe bolts and nuts, 16- 15, and freeing the clamping members, l2--12, soas to permit the removal of the entire hood. After the necessary repairsare made, the hood and cover can be replaced and securely held inposition by the clamping members as before described.

We wish it to be understood that the bracket members, which are engagedby the clamping bolts might be formed by simply bending the end portionsof the clamping members, 12-27, outwardly and providing them withnecessary bolt holes, but we prefer to provide these clamping memberswith detachable brackets held in place by machine screws, as in someinstances it is difficult to remove these clamping members and replacethem on account of the presence of other portions of the apparatus, andby detaching the bracket members where this is desirable or necessary,the clamping members can be withdrawn endwise advantageously withoutinterfering with the surrounding portions of the apparatus. Of coursewhere it is possible to remove the clamping members by simply liftingthem vertically, it is only necessary to loosen one bolt to release thecover or smoke hood, as the case may be, and permit the removal of thesame.

The hinged door, 24, is provided more particularly for the purpose ofenabling the operator to inspect the interior of the smoke hood and theupper ends of the boiler tubes without removing the cover and also toafford a direct upward draft where desired in the preliminary getting upsteam where this is desired. Of course if a defective boiler tubehappened to be located with respect to this door in the cover so that itcould be reached and repaired without removing the cover, this could bedone, but ordinarily the door could not be used for this purpose.

It will be readily seen that by employing our improved detachable smokehood, access can be had to the upper ends of the boiler fire tubes in afew minutes without disturbing the heat insulating material and withoutthe necessity of taking down and rebuilding a boiler hood constructionof practically permanent character with the incident expense for timeand labor which would be required, Therefore, by the use of our improvedsmoke hood repairs, whether of a temporary or permanent character, canbe readily made at much less expense and with much less loss of time andmoney. Repairs can be made on the road which is a practicalimpossibility where it is necessary to take down and replace a smokehood of the'usual permanent character. It will also be noted that theonly bolts which have to be loosened in order to permit the removal ofthe cover or the entire smoke hood, as the case may be, are thoseconnecting the clamp ing members, which are located on the eX- terior ofthe smoke hood, where access can be had to them and where they are notlikely to be so affected by heat or moisture as to interfere with theirbeing removed by ordinary simple tools when occasion requires.

In connection with the hinged door, 24, in the cover, we prefer toprovide means for supporting the door in open position so that it willbe maintained upright and just sufficiently past the verticalv positionas to remain in open position, but nearly enough to a balanced positionso that should the operator forget to close it the jar imparted bydriving the car will cause it to fall into closed position. As shown inthe drawings, Figs. 1, 2, 3 and 6, the door is provided with hingeleaves, 40 and 41, riveted or otherwise secured to the top, 17, of theremovable cover, and to the door, 24, respectively, and we preferablyprovide a stop comprising an an gle plate having a flange, 42, lyingupon the hinge leaf, 41, and secured to the door by the same rivets orother fastenings which hold the hinge leaf in position, and having anupwardly extending flange, 43, so dis posed that it will support thehinged door in substantially vertical position, as indicated in dottedlines in Fig. 6, when the door is raised into open position. If theoperator should forget to close the door after opening it, the ordinaryvibration of the car in start ing the engine will cause the door toclose, and thus prevent the products of combustion from passing outthrough the door opening, and to insure their discharge through theoutlet pipe, 33. 7

What we claim and desire to secure by Letters Patent is:

1. The combination with a vertical fire tube boiler and means forsupporting it upon the chassis of an automobile, of a smoke hood at theupper end of the boiler, provided with a lateral smoke outlet, andprovided with a readily detachable and removable cover, having an areacorresponding substantially to that of the head of the boiler, andcapable of being removedbodily from the smoke hood to give access to allof the fire tubes for repairing the boiler without disturbing the boilerand smoke hood.

2. The combination with a vertical fire tube boiler and means forsupporting it upon the chassis of an automobile, of a readily detachablesmoke hood provided with a lateral smoke outlet, detachably connectedwith the upper end of the boiler, and capable of being removed bodilyfrom the latter without disassembling the smoke hood, said smoke hoodbeing provided with a readily detachable and removable cover,

of being. removed bodily from the smoke hood .to give access to all ofthe fire tubes for 'repairingthe boiler, without disturbing the boilerand smoke hood. r

3. The combination with a vertical fire tub boiler and means forsupporting it upon thechassis of an automobile, of areadily detachablesmoke hood provided with a lateral smoke outlet, and having at one-endprojecting portions for trictionally engaging and fitting the head ofthe boiler, and at the other end projecting portions for frictionallyengaging a cover, and a readily detachable cover of substantially thesame areaias the boiler headengaging said last mentioned projectingportions of the head, readily detachable means for securing the cover tothe hood and readily detachable means for securing the hood to theboiler.

4. The combination with a vertical fire tube boiler and means forsupporting it upon the chassis of an automobile, of a smoke hood securedto the upper end of the boiler, and provided with a lateral smokeoutlet, said hood having its outer end provided with projecting portionsto frictionally engage a detachable cover, a readily detachable cover ofsubstantially the same area as the head of the boiler frictionallyengaging and fitting the said projecting portions of the hood, wherebysaid cover can be bodily removed from said hood to give access to all ofthe boiler tubes.

5. The combination with a vertical fire tube boiler and means forsupporting it upon the chassis of an automobile, of a smoke hood securedto the upper end of said boiler and comprising outer and inner metallicshells, and heat insulating material located between said shells, saidhood having a lateral smoke outlet extending through said shells, acover of substantially the area of the boiler head, formed hollow andfilled with heat insulating material, the upper end of said hood andsaid cover being provided the one with an annular flange to engage andfit the other, and means for detachably securing the cover to the saidhood.

6. A detachable smoke hood for a fire tube boiler, comprising acylindrical body composedofouter and inner shells, spacing devicessecured to and between said shells, heatinsulating material located inthe space between said shells, said body being provided; at its lowerend with an annular flange fitting the upper end of the. boiler,andatitsupper end with an annular cover engaging; flange, and beingprovided with a lateral outlet'for products of combustion, a; cover ofsubstantially the diameter of said cylindrical body, formed hollow andfilled with heat insulating material, means for detachably securing saidbody to the boiler, and means for detachably securing the cover to thebody.

7. A detachable smoke hood for a fire tube boiler, comprising a.cylindrical body composed of outer and inner shells, spacing devicessecured to and between said shells, heat insulating material located inthe space between said shells, said body being provided at its lower endwith an annular flange fitting the upper end of the boiler, and at itsupper end with an annular cover engaging flange, and being provided witha lateral outlet for products of combustion, a cover of substantiallythe diameter of the outer shell, and comprising :1- bottom plate. a topplate, and a lateral flange portion, and. filled with heat insulatingmaterial, said cover fitting within the outer shell of the main body andresting upon the upper end. of the inner shell. detachable means forsecuring the said body to the boiler, and detachable means for securingthe cover to the said body.

8. The combination with a. vertical fire tube boiler and means forsupporting it upon the chassis of an automobile, of a smoke hood securedto the upper end of said boiler and comprising outer and inner metallicshells, and heat insulating material located between said shells, saidhood having a lateral smoke outlet extending through said shells, acover of substantially the area. of the boiler head, formed hollow andfilled with heat insulating material, the upper end or": said hood andsaid cover being provided the one with an annular flange to engage andfit the other. and an annular clamping member surrounding the engagingportions of the hood and cover for rigidly but detachably securing themtogether.

9. The combination with a vertical lire tube boiler and means forsupporting it upon the chassis of an automobile. of: a smoke hoodcomprising a. main body consisting of a pair of spaced concentric shellsprovided with heat insulating material between them, the outer shellbeing provided at its lower end with a projecting annular flange tofrictionally engage the end of: the boiler, and at its upper end with aprojecting annular flange to frictionally engage the cover, a covercomprising spaced top and bottom plates, and an annular flange portionconnecting them, said cover being filled with heat insulating materialand said annular flange portion frictionally but detachably engaging theupper flange portion of the hood, and annular clamping memberssurrounding the hood adjacent to its upper and lower ends for detachablyclamping the hood to the boiler and the cover to the hood.

10. A detachable smoke hood for a fire tube boiler, comprising a mainbody consisting of a pair of spaced concentric shells,

provided with heat insulating material between them, the outer shellextending beyond the inner shell at each end of said body to formattaching flanges, one of which fits the end of the boiler, a covercomprising spaced top and bottom plates and an annular flange portionconnecting them, and filled with heat insulating material, said coverfitting within the other attaching flange of the main body, said mainbody being provided with a lateral outlet aperture, and with metalliccleats on opposite sides thereof for engaging said cleats, anddetachable clamping devices surrounding said attaching flanges of themain body respectively above and below said outlet pipe.

11. A detachable smoke hood for a fire tube boiler, comprising a mainbody consisting oi a pair of spaced concentric shells, provided withheat insulating material be tween them, the outer shell extending beyondthe inner shell ateach end of said body to form attaching flanges, oneof which fits the end of the boiler, a cover comprising spaced top andbottom plates and an annular flange portion connecting them, and filledwith heat insulating material, said cover fitting within the otherattaching flange of the main body, a clamping device engaging one ofsaid attaching flanges comprising clamping bands, brackets detachablyconnected to said bands, and bolt and nut for connecting said brackets,and detachable connecting means for the other of said attaching flanges.

12. A detachable smoke hood for a fire tube boiler, comprising a mainbody consisting'of a pair of spaced concentric shells, provided withheat insulating material between them, the outer shell extending beyondthe inner shell at each end of said body to form attaching flanges, oneof which fits the end of the boiler, a cover comprising spaced top andbottom plates and an annular flange portion connecting them, and filledwith heat insulating ma:- terial, said cover fitting within the otherattaching flange of the main body, detachable clamping devices engagingsaid attaching flanges, said cover being provided with an aperture, anda closure for said aperture, said main body being provided with alateral outlet aperture for the products of combustion, and a dischargepipe connected to said main body and communicating with said aperture.

13. A smoke hood for a vertical flue fire tube boiler for automobiles,having its upper end provided with an aperture, a hinged door fornormally closing said aperture, and a stop for maintaining the door insubstantially vertical and substantially balanced position when open, sothat it will automatically close by the jarring or vibration of thehood.

14. A detachable smoke hood for a fire tube boiler, lateral portions atone end to fit upon the boiler, lateral portions at the other end toreceive a readily detachable cover, provided with an aperture therein,means for detachably securing said lateral portions to the boiler and tosaid cover, and a hinged door for the cover aperture provided with astop for holding it in sub stantially vertical and substantiallybalanced position when open, so that any jar or vibration of the hoodwill automatically close it.

In testimony whereof we affix our signatures.

ROBERTG. MARR. GEORGE A. VEDDER.

